/*
* Druid - a distributed column store.
* Copyright (C) 2012, 2013 Metamarkets Group Inc.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
package io.druid.indexing.common.task;
import com.fasterxml.jackson.annotation.JsonIgnore;
import com.fasterxml.jackson.annotation.JsonProperty;
import com.google.common.base.Preconditions;
import io.druid.indexing.common.actions.LockTryAcquireAction;
import io.druid.indexing.common.actions.TaskActionClient;
import org.joda.time.Interval;
public abstract class AbstractFixedIntervalTask extends AbstractTask
{
@JsonIgnore
private final Interval interval;
protected AbstractFixedIntervalTask(
String id,
String dataSource,
Interval interval
)
{
this(id, id, new TaskResource(id, 1), dataSource, interval);
}
protected AbstractFixedIntervalTask(
String id,
String groupId,
String dataSource,
Interval interval
)
{
this(id, groupId, new TaskResource(id, 1), dataSource, interval);
}
protected AbstractFixedIntervalTask(
String id,
String groupId,
TaskResource taskResource,
String dataSource,
Interval interval
)
{
super(id, groupId, taskResource, dataSource);
this.interval = Preconditions.checkNotNull(interval, "interval");
Preconditions.checkArgument(interval.toDurationMillis() > 0, "interval empty");
}
@Override
public boolean isReady(TaskActionClient taskActionClient) throws Exception
{
return taskActionClient.submit(new LockTryAcquireAction(interval)).isPresent();
}
@JsonProperty
public Interval getInterval()
{
return interval;
}
}